X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/153058238352d96ef902ddba41f3f7bd3ea7dbfe..51c23076e2b42ff07dc167dea1cb0e3a4ab3cf68:/src/xbt/xbt_os_thread.c diff --git a/src/xbt/xbt_os_thread.c b/src/xbt/xbt_os_thread.c index 50a9a4cb63..3b58603ffa 100644 --- a/src/xbt/xbt_os_thread.c +++ b/src/xbt/xbt_os_thread.c @@ -1,50 +1,60 @@ /* xbt_os_thread -- portability layer over the pthread API */ /* Used in RL to get win/lin portability, and in SG when CONTEXT_THREAD */ -/* in SG, when using CONTEXT_UCONTEXT, xbt_os_thread_stub is used instead */ +/* in SG, when using HAVE_UCONTEXT_CONTEXTS, xbt_os_thread_stub is used instead */ -/* Copyright (c) 2007-2014. The SimGrid Team. +/* Copyright (c) 2007-2018. The SimGrid Team. * All rights reserved. */ /* This program is free software; you can redistribute it and/or modify it * under the terms of the license (GNU LGPL) which comes with this package. */ -#include "internal_config.h" -#include "xbt/sysdep.h" -#include "xbt/ex.h" -#include "xbt/ex_interface.h" /* We play crude games with exceptions */ -#include "portable.h" -#include "xbt/xbt_os_time.h" /* Portable time facilities */ -#include "xbt/xbt_os_thread.h" /* This module */ -#include "xbt_modinter.h" /* Initialization/finalization of this module */ +#include "src/internal_config.h" +#if HAVE_PTHREAD_SETAFFINITY +#define _GNU_SOURCE +#include +#endif -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os, xbt, - "Synchronization mechanism (OS-level)"); +#include -/* ********************************* PTHREAD IMPLEMENTATION ************************************ */ -#ifndef _XBT_WIN32 +#if defined(__FreeBSD__) +#include "pthread_np.h" +#define cpu_set_t cpuset_t +#endif -#include #include #include - -#ifdef CORE_BINDING -#define _GNU_SOURCE -#include +#include + +#if defined(_WIN32) +#include +#elif defined(__MACH__) && defined(__APPLE__) +#include +#include +#include +#else +#include #endif -/* use named sempahore when sem_init() does not work */ -#ifndef HAVE_SEM_INIT +#include "xbt/sysdep.h" +#include "xbt/ex.h" +#include "src/internal_config.h" +#include "xbt/xbt_os_time.h" /* Portable time facilities */ +#include "xbt/xbt_os_thread.h" /* This module */ +#include "src/xbt_modinter.h" /* Initialization/finalization of this module */ + +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(xbt_sync_os, xbt, "Synchronization mechanism (OS-level)"); + +/* use named semaphore when sem_init() does not work */ +#if !HAVE_SEM_INIT static int next_sem_ID = 0; static xbt_os_mutex_t next_sem_ID_lock; #endif typedef struct xbt_os_thread_ { pthread_t t; - int detached; char *name; void *param; pvoid_f_pvoid_t start_routine; - xbt_running_ctx_t *running_ctx; void *extra_data; } s_xbt_os_thread_t; static xbt_os_thread_t main_thread = NULL; @@ -62,59 +72,36 @@ static void xbt_os_thread_free_thread_data(xbt_os_thread_t thread) { if (thread == main_thread) /* just killed main thread */ main_thread = NULL; - - free(thread->running_ctx); free(thread->name); free(thread); } -/* callback: context fetching */ -static xbt_running_ctx_t *_os_thread_get_running_ctx(void) -{ - return xbt_os_thread_self()->running_ctx; -} - -/* callback: termination */ -static void _os_thread_ex_terminate(xbt_ex_t * e) -{ - xbt_ex_display(e); - xbt_abort(); - /* FIXME: there should be a configuration variable to choose to kill everyone or only this one */ -} - void xbt_os_thread_mod_preinit(void) { - int errcode; - if (thread_mod_inited) return; - if ((errcode = pthread_key_create(&xbt_self_thread_key, NULL))) - THROWF(system_error, errcode, - "pthread_key_create failed for xbt_self_thread_key"); - + int errcode = pthread_key_create(&xbt_self_thread_key, NULL); + xbt_assert(errcode == 0, "pthread_key_create failed for xbt_self_thread_key"); + main_thread = xbt_new(s_xbt_os_thread_t, 1); - main_thread->name = (char *) "main"; - main_thread->start_routine = NULL; + main_thread->name = NULL; + main_thread->name = xbt_strdup("main"); main_thread->param = NULL; - main_thread->running_ctx = xbt_new(xbt_running_ctx_t, 1); - XBT_RUNNING_CTX_INITIALIZE(main_thread->running_ctx); + main_thread->start_routine = NULL; + main_thread->extra_data = NULL; if ((errcode = pthread_setspecific(xbt_self_thread_key, main_thread))) THROWF(system_error, errcode, - "pthread_setspecific failed for xbt_self_thread_key"); - - __xbt_running_ctx_fetch = _os_thread_get_running_ctx; - __xbt_ex_terminate = _os_thread_ex_terminate; + "Impossible to set the SimGrid identity descriptor to the main thread (pthread_setspecific failed)"); pthread_attr_init(&thread_attr); thread_mod_inited = 1; -#ifndef HAVE_SEM_INIT +#if !HAVE_SEM_INIT next_sem_ID_lock = xbt_os_mutex_init(); #endif - } void xbt_os_thread_mod_postexit(void) @@ -125,84 +112,68 @@ void xbt_os_thread_mod_postexit(void) // if ((errcode=pthread_key_delete(xbt_self_thread_key))) // THROWF(system_error,errcode,"pthread_key_delete failed for xbt_self_thread_key"); - free(main_thread->running_ctx); + free(main_thread->name); free(main_thread); main_thread = NULL; thread_mod_inited = 0; -#ifndef HAVE_SEM_INIT +#if !HAVE_SEM_INIT xbt_os_mutex_destroy(next_sem_ID_lock); #endif - - /* Restore the default exception setup */ - __xbt_running_ctx_fetch = &__xbt_ex_ctx_default; - __xbt_ex_terminate = &__xbt_ex_terminate_default; } +/** Calls pthread_atfork() if present, and raise an exception otherwise. + * + * The only known user of this wrapper is mmalloc_preinit(), but it is absolutely mandatory there: + * when used with tesh, mmalloc *must* be mutex protected and resistant to forks. + * This functionality is the only way to get it working (by ensuring that the mutex is consistently released on forks) + */ + /* this function is critical to tesh+mmalloc, don't mess with it */ -int xbt_os_thread_atfork(void (*prepare)(void), - void (*parent)(void), void (*child)(void)) +int xbt_os_thread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void)) { -#ifdef WIN32 - THROW_UNIMPLEMENTED; //pthread_atfork is not implemented in pthread.h on windows -#else return pthread_atfork(prepare, parent, child); -#endif } static void *wrapper_start_routine(void *s) { xbt_os_thread_t t = s; - int errcode; - if ((errcode = pthread_setspecific(xbt_self_thread_key, t))) - THROWF(system_error, errcode, - "pthread_setspecific failed for xbt_self_thread_key"); + int errcode = pthread_setspecific(xbt_self_thread_key, t); + xbt_assert(errcode == 0, "pthread_setspecific failed for xbt_self_thread_key"); - void *res = t->start_routine(t->param); - if (t->detached) - xbt_os_thread_free_thread_data(t); - return res; + return t->start_routine(t->param); } - -xbt_os_thread_t xbt_os_thread_create(const char *name, - pvoid_f_pvoid_t start_routine, - void *param, - void *extra_data) +xbt_os_thread_t xbt_os_thread_create(const char *name, pvoid_f_pvoid_t start_routine, void *param, void *extra_data) { - int errcode; - xbt_os_thread_t res_thread = xbt_new(s_xbt_os_thread_t, 1); - res_thread->detached = 0; res_thread->name = xbt_strdup(name); res_thread->start_routine = start_routine; res_thread->param = param; - res_thread->running_ctx = xbt_new(xbt_running_ctx_t, 1); - XBT_RUNNING_CTX_INITIALIZE(res_thread->running_ctx); res_thread->extra_data = extra_data; - - if ((errcode = pthread_create(&(res_thread->t), &thread_attr, - wrapper_start_routine, res_thread))) - THROWF(system_error, errcode, - "pthread_create failed: %s", strerror(errcode)); - + int errcode = pthread_create(&(res_thread->t), &thread_attr, wrapper_start_routine, res_thread); + xbt_assert(errcode == 0, "pthread_create failed: %s", strerror(errcode)); return res_thread; } - -#ifdef CORE_BINDING -int xbt_os_thread_bind(xbt_os_thread_t thread, int cpu){ - pthread_t pthread = thread->t; +/** Bind the thread to the given core, if possible. + * + * If pthread_setaffinity_np is not usable on that (non-gnu) platform, this function does nothing. + */ +int xbt_os_thread_bind(XBT_ATTRIB_UNUSED xbt_os_thread_t thread, XBT_ATTRIB_UNUSED int cpu) +{ int errcode = 0; +#if HAVE_PTHREAD_SETAFFINITY + pthread_t pthread = thread->t; cpu_set_t cpuset; CPU_ZERO(&cpuset); CPU_SET(cpu, &cpuset); errcode = pthread_setaffinity_np(pthread, sizeof(cpu_set_t), &cpuset); +#endif return errcode; } -#endif void xbt_os_thread_setstacksize(int stack_size) { @@ -213,32 +184,27 @@ void xbt_os_thread_setstacksize(int stack_size) #endif 0 }; - size_t sz; - int res; - int i; - if (stack_size < 0) - xbt_die("stack size %d is negative, maybe it exceeds MAX_INT?", stack_size); + xbt_assert(stack_size >= 0, "stack size %d is negative, maybe it exceeds MAX_INT?", stack_size); - sz = stack_size; - res = pthread_attr_setstacksize(&thread_attr, sz); + size_t sz = stack_size; + int res = pthread_attr_setstacksize(&thread_attr, sz); - for (i = 0; res == EINVAL && alignment[i] > 0; i++) { + for (int i = 0; res == EINVAL && alignment[i] > 0; i++) { /* Invalid size, try again with next multiple of alignment[i]. */ size_t rem = sz % alignment[i]; if (rem != 0 || sz == 0) { size_t sz2 = sz - rem + alignment[i]; - XBT_DEBUG("pthread_attr_setstacksize failed for %zd, try again with %zd", - sz, sz2); + XBT_DEBUG("pthread_attr_setstacksize failed for %zu, try again with %zu", sz, sz2); sz = sz2; res = pthread_attr_setstacksize(&thread_attr, sz); } } if (res == EINVAL) - XBT_WARN("invalid stack size (maybe too big): %zd", sz); + XBT_WARN("invalid stack size (maybe too big): %zu", sz); else if (res != 0) - XBT_WARN("unknown error %d in pthread stacksize setting: %zd", res, sz); + XBT_WARN("unknown error %d in pthread stacksize setting: %zu", res, sz); } void xbt_os_thread_setguardsize(int guard_size) @@ -249,29 +215,21 @@ void xbt_os_thread_setguardsize(int guard_size) size_t sz = guard_size; int res = pthread_attr_setguardsize(&thread_attr, sz); if (res) - XBT_WARN("pthread_attr_setguardsize failed (%d) for size: %zd", res, sz); + XBT_WARN("pthread_attr_setguardsize failed (%d) for size: %zu", res, sz); #endif } -const char *xbt_os_thread_name(xbt_os_thread_t t) -{ - return t->name; -} - const char *xbt_os_thread_self_name(void) { xbt_os_thread_t me = xbt_os_thread_self(); - return me ? me->name : "main"; + return me ? (const char *)me->name : "main"; } void xbt_os_thread_join(xbt_os_thread_t thread, void **thread_return) { + int errcode = pthread_join(thread->t, thread_return); - int errcode; - - if ((errcode = pthread_join(thread->t, thread_return))) - THROWF(system_error, errcode, "pthread_join failed: %s", - strerror(errcode)); + xbt_assert(errcode==0, "pthread_join failed: %s", strerror(errcode)); xbt_os_thread_free_thread_data(thread); } @@ -280,40 +238,35 @@ void xbt_os_thread_exit(int *retval) pthread_exit(retval); } -xbt_os_thread_t xbt_os_thread_self(void) +xbt_os_thread_t xbt_os_thread_self(void ) { - xbt_os_thread_t res; - if (!thread_mod_inited) return NULL; - res = pthread_getspecific(xbt_self_thread_key); - - return res; + return pthread_getspecific(xbt_self_thread_key); } -void xbt_os_thread_key_create(xbt_os_thread_key_t* key) { - - int errcode; - if ((errcode = pthread_key_create(key, NULL))) - THROWF(system_error, errcode, "pthread_key_create failed"); +void xbt_os_thread_key_create(xbt_os_thread_key_t* key) +{ + int errcode = pthread_key_create(key, NULL); + xbt_assert(errcode==0 , "pthread_key_create failed"); } -void xbt_os_thread_set_specific(xbt_os_thread_key_t key, void* value) { - - int errcode; - if ((errcode = pthread_setspecific(key, value))) - THROWF(system_error, errcode, "pthread_setspecific failed"); +void xbt_os_thread_key_destroy(xbt_os_thread_key_t key) +{ + int errcode = pthread_key_delete(key); + xbt_assert(errcode == 0, "pthread_key_delete failed"); } -void* xbt_os_thread_get_specific(xbt_os_thread_key_t key) { - return pthread_getspecific(key); +void xbt_os_thread_set_specific(xbt_os_thread_key_t key, void* value) +{ + int errcode = pthread_setspecific(key, value); + xbt_assert(errcode==0, "pthread_setspecific failed"); } -void xbt_os_thread_detach(xbt_os_thread_t thread) +void* xbt_os_thread_get_specific(xbt_os_thread_key_t key) { - thread->detached = 1; - pthread_detach(thread->t); + return pthread_getspecific(key); } #include @@ -322,14 +275,8 @@ void xbt_os_thread_yield(void) sched_yield(); } -void xbt_os_thread_cancel(xbt_os_thread_t t) -{ - pthread_cancel(t->t); -} - /****** mutex related functions ******/ typedef struct xbt_os_mutex_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ pthread_mutex_t m; } s_xbt_os_mutex_t; @@ -338,204 +285,82 @@ typedef struct xbt_os_mutex_ { xbt_os_mutex_t xbt_os_mutex_init(void) { - xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t, 1); - int errcode; + pthread_mutexattr_t Attr; + pthread_mutexattr_init(&Attr); + pthread_mutexattr_settype(&Attr, PTHREAD_MUTEX_RECURSIVE); - if ((errcode = pthread_mutex_init(&(res->m), NULL))) - THROWF(system_error, errcode, "pthread_mutex_init() failed: %s", - strerror(errcode)); + xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t, 1); + int errcode = pthread_mutex_init(&(res->m), &Attr); + xbt_assert(errcode==0, "pthread_mutex_init() failed: %s", strerror(errcode)); return res; } void xbt_os_mutex_acquire(xbt_os_mutex_t mutex) { - int errcode; - - if ((errcode = pthread_mutex_lock(&(mutex->m)))) - THROWF(system_error, errcode, "pthread_mutex_lock(%p) failed: %s", - mutex, strerror(errcode)); -} - - -void xbt_os_mutex_timedacquire(xbt_os_mutex_t mutex, double delay) -{ - int errcode; - - if (delay < 0) { - xbt_os_mutex_acquire(mutex); - - } else if (delay == 0) { - errcode = pthread_mutex_trylock(&(mutex->m)); - - switch (errcode) { - case 0: - return; - case ETIMEDOUT: - THROWF(timeout_error, 0, "mutex %p not ready", mutex); - default: - THROWF(system_error, errcode, - "xbt_os_mutex_timedacquire(%p) failed: %s", mutex, - strerror(errcode)); - } - - - } else { - -#ifdef HAVE_MUTEX_TIMEDLOCK - struct timespec ts_end; - double end = delay + xbt_os_time(); - - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ((end - ts_end.tv_sec) * 1000000000); - XBT_DEBUG("pthread_mutex_timedlock(%p,%p)", &(mutex->m), &ts_end); - - errcode = pthread_mutex_timedlock(&(mutex->m), &ts_end); - -#else /* Well, let's reimplement it since those lazy libc dudes didn't */ - double start = xbt_os_time(); - do { - errcode = pthread_mutex_trylock(&(mutex->m)); - if (errcode == EBUSY) - xbt_os_thread_yield(); - } while (errcode == EBUSY && xbt_os_time() - start < delay); - - if (errcode == EBUSY) - errcode = ETIMEDOUT; - -#endif /* HAVE_MUTEX_TIMEDLOCK */ - - switch (errcode) { - case 0: - return; - - case ETIMEDOUT: - THROWF(timeout_error, delay, - "mutex %p wasn't signaled before timeout (%f)", mutex, delay); - - default: - THROWF(system_error, errcode, - "pthread_mutex_timedlock(%p,%f) failed: %s", mutex, delay, - strerror(errcode)); - } - } + int errcode = pthread_mutex_lock(&(mutex->m)); + xbt_assert(errcode==0, "pthread_mutex_lock(%p) failed: %s", mutex, strerror(errcode)); } void xbt_os_mutex_release(xbt_os_mutex_t mutex) { - int errcode; - - if ((errcode = pthread_mutex_unlock(&(mutex->m)))) - THROWF(system_error, errcode, "pthread_mutex_unlock(%p) failed: %s", - mutex, strerror(errcode)); + int errcode = pthread_mutex_unlock(&(mutex->m)); + xbt_assert(errcode==0, "pthread_mutex_unlock(%p) failed: %s", mutex, strerror(errcode)); } void xbt_os_mutex_destroy(xbt_os_mutex_t mutex) { - int errcode; - if (!mutex) return; - if ((errcode = pthread_mutex_destroy(&(mutex->m)))) - THROWF(system_error, errcode, "pthread_mutex_destroy(%p) failed: %s", - mutex, strerror(errcode)); + int errcode = pthread_mutex_destroy(&(mutex->m)); + xbt_assert(errcode == 0, "pthread_mutex_destroy(%p) failed: %s", mutex, strerror(errcode)); free(mutex); } /***** condition related functions *****/ typedef struct xbt_os_cond_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ pthread_cond_t c; } s_xbt_os_cond_t; xbt_os_cond_t xbt_os_cond_init(void) { xbt_os_cond_t res = xbt_new(s_xbt_os_cond_t, 1); - int errcode; - if ((errcode = pthread_cond_init(&(res->c), NULL))) - THROWF(system_error, errcode, "pthread_cond_init() failed: %s", - strerror(errcode)); - + int errcode = pthread_cond_init(&(res->c), NULL); + xbt_assert(errcode==0, "pthread_cond_init() failed: %s", strerror(errcode)); return res; } void xbt_os_cond_wait(xbt_os_cond_t cond, xbt_os_mutex_t mutex) { - int errcode; - if ((errcode = pthread_cond_wait(&(cond->c), &(mutex->m)))) - THROWF(system_error, errcode, "pthread_cond_wait(%p,%p) failed: %s", - cond, mutex, strerror(errcode)); -} - - -void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, - double delay) -{ - int errcode; - struct timespec ts_end; - double end = delay + xbt_os_time(); - - if (delay < 0) { - xbt_os_cond_wait(cond, mutex); - } else { - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ((end - ts_end.tv_sec) * 1000000000); - XBT_DEBUG("pthread_cond_timedwait(%p,%p,%p)", &(cond->c), &(mutex->m), - &ts_end); - switch ((errcode = - pthread_cond_timedwait(&(cond->c), &(mutex->m), &ts_end))) { - case 0: - return; - case ETIMEDOUT: - THROWF(timeout_error, errcode, - "condition %p (mutex %p) wasn't signaled before timeout (%f)", - cond, mutex, delay); - default: - THROWF(system_error, errcode, - "pthread_cond_timedwait(%p,%p,%f) failed: %s", cond, mutex, - delay, strerror(errcode)); - } - } + int errcode = pthread_cond_wait(&(cond->c), &(mutex->m)); + xbt_assert(errcode==0, "pthread_cond_wait(%p,%p) failed: %s", cond, mutex, strerror(errcode)); } void xbt_os_cond_signal(xbt_os_cond_t cond) { - int errcode; - if ((errcode = pthread_cond_signal(&(cond->c)))) - THROWF(system_error, errcode, "pthread_cond_signal(%p) failed: %s", - cond, strerror(errcode)); + int errcode = pthread_cond_signal(&(cond->c)); + xbt_assert(errcode==0, "pthread_cond_signal(%p) failed: %s", cond, strerror(errcode)); } void xbt_os_cond_broadcast(xbt_os_cond_t cond) { - int errcode; - if ((errcode = pthread_cond_broadcast(&(cond->c)))) - THROWF(system_error, errcode, "pthread_cond_broadcast(%p) failed: %s", - cond, strerror(errcode)); + int errcode = pthread_cond_broadcast(&(cond->c)); + xbt_assert(errcode==0, "pthread_cond_broadcast(%p) failed: %s", cond, strerror(errcode)); } void xbt_os_cond_destroy(xbt_os_cond_t cond) { - int errcode; - if (!cond) return; - if ((errcode = pthread_cond_destroy(&(cond->c)))) - THROWF(system_error, errcode, "pthread_cond_destroy(%p) failed: %s", - cond, strerror(errcode)); + int errcode = pthread_cond_destroy(&(cond->c)); + xbt_assert(errcode==0, "pthread_cond_destroy(%p) failed: %s", cond, strerror(errcode)); free(cond); } -void *xbt_os_thread_getparam(void) -{ - xbt_os_thread_t t = xbt_os_thread_self(); - return t ? t->param : NULL; -} - typedef struct xbt_os_sem_ { -#ifndef HAVE_SEM_INIT +#if !HAVE_SEM_INIT char *name; #endif sem_t s; @@ -554,7 +379,7 @@ xbt_os_sem_t xbt_os_sem_init(unsigned int value) * Any attempt to use it leads to ENOSYS (function not implemented). * If such a prehistoric system is detected, do the job with sem_open instead */ -#ifdef HAVE_SEM_INIT +#if HAVE_SEM_INIT if (sem_init(&(res->s), 0, value) != 0) THROWF(system_error, errno, "sem_init() failed: %s", strerror(errno)); res->ps = &(res->s); @@ -562,13 +387,15 @@ xbt_os_sem_t xbt_os_sem_init(unsigned int value) #else /* damn, no sem_init(). Reimplement it */ xbt_os_mutex_acquire(next_sem_ID_lock); - res->name = bprintf("/%d", ++next_sem_ID); + res->name = bprintf("/sg-%d", ++next_sem_ID); xbt_os_mutex_release(next_sem_ID_lock); + sem_unlink(res->name); res->ps = sem_open(res->name, O_CREAT, 0644, value); if ((res->ps == (sem_t *) SEM_FAILED) && (errno == ENAMETOOLONG)) { /* Old darwins only allow 13 chars. Did you create *that* amount of semaphores? */ res->name[13] = '\0'; + sem_unlink(res->name); res->ps = sem_open(res->name, O_CREAT, 0644, value); } if (res->ps == (sem_t *) SEM_FAILED) @@ -586,664 +413,29 @@ xbt_os_sem_t xbt_os_sem_init(unsigned int value) void xbt_os_sem_acquire(xbt_os_sem_t sem) { - if (!sem) - THROWF(arg_error, EINVAL, "Cannot acquire of the NULL semaphore"); if (sem_wait(sem->ps) < 0) THROWF(system_error, errno, "sem_wait() failed: %s", strerror(errno)); } -void xbt_os_sem_timedacquire(xbt_os_sem_t sem, double delay) -{ - int errcode; - - if (!sem) - THROWF(arg_error, EINVAL, "Cannot acquire of the NULL semaphore"); - - if (delay < 0) { - xbt_os_sem_acquire(sem); - } else if (delay == 0) { - errcode = sem_trywait(sem->ps); - - switch (errcode) { - case 0: - return; - case ETIMEDOUT: - THROWF(timeout_error, 0, "semaphore %p not ready", sem); - default: - THROWF(system_error, errcode, - "xbt_os_sem_timedacquire(%p) failed: %s", sem, - strerror(errcode)); - } - - } else { -#ifdef HAVE_SEM_WAIT - struct timespec ts_end; - double end = delay + xbt_os_time(); - - ts_end.tv_sec = (time_t) floor(end); - ts_end.tv_nsec = (long) ((end - ts_end.tv_sec) * 1000000000); - XBT_DEBUG("sem_timedwait(%p,%p)", sem->ps, &ts_end); - errcode = sem_timedwait(sem->s, &ts_end); - -#else /* Okay, reimplement this function then */ - double start = xbt_os_time(); - do { - errcode = sem_trywait(sem->ps); - if (errcode == EBUSY) - xbt_os_thread_yield(); - } while (errcode == EBUSY && xbt_os_time() - start < delay); - - if (errcode == EBUSY) - errcode = ETIMEDOUT; -#endif - - switch (errcode) { - case 0: - return; - - case ETIMEDOUT: - THROWF(timeout_error, delay, - "semaphore %p wasn't signaled before timeout (%f)", sem, - delay); - - default: - THROWF(system_error, errcode, "sem_timedwait(%p,%f) failed: %s", sem, - delay, strerror(errcode)); - } - } -} - void xbt_os_sem_release(xbt_os_sem_t sem) { - if (!sem) - THROWF(arg_error, EINVAL, "Cannot release of the NULL semaphore"); - if (sem_post(sem->ps) < 0) THROWF(system_error, errno, "sem_post() failed: %s", strerror(errno)); } void xbt_os_sem_destroy(xbt_os_sem_t sem) { - if (!sem) - THROWF(arg_error, EINVAL, "Cannot destroy the NULL sempahore"); - -#ifdef HAVE_SEM_INIT +#if HAVE_SEM_INIT if (sem_destroy(sem->ps) < 0) - THROWF(system_error, errno, "sem_destroy() failed: %s", - strerror(errno)); + THROWF(system_error, errno, "sem_destroy() failed: %s", strerror(errno)); #else if (sem_close(sem->ps) < 0) THROWF(system_error, errno, "sem_close() failed: %s", strerror(errno)); xbt_free(sem->name); - -#endif - xbt_free(sem); -} - -void xbt_os_sem_get_value(xbt_os_sem_t sem, int *svalue) -{ - if (!sem) - THROWF(arg_error, EINVAL, - "Cannot get the value of the NULL semaphore"); - - if (sem_getvalue(&(sem->s), svalue) < 0) - THROWF(system_error, errno, "sem_getvalue() failed: %s", - strerror(errno)); -} - -/* ********************************* WINDOWS IMPLEMENTATION ************************************ */ - -#elif defined(_XBT_WIN32) - -#include - -typedef struct xbt_os_thread_ { - char *name; - HANDLE handle; /* the win thread handle */ - unsigned long id; /* the win thread id */ - pvoid_f_pvoid_t start_routine; - void *param; - void *extra_data; -} s_xbt_os_thread_t; - -/* so we can specify the size of the stack of the threads */ -#ifndef STACK_SIZE_PARAM_IS_A_RESERVATION -#define STACK_SIZE_PARAM_IS_A_RESERVATION 0x00010000 -#endif - -/* the default size of the stack of the threads (in bytes)*/ -#define XBT_DEFAULT_THREAD_STACK_SIZE 4096 -static int stack_size=0; -/* key to the TLS containing the xbt_os_thread_t structure */ -static unsigned long xbt_self_thread_key; - -void xbt_os_thread_mod_preinit(void) -{ - xbt_self_thread_key = TlsAlloc(); -} - -void xbt_os_thread_mod_postexit(void) -{ - - if (!TlsFree(xbt_self_thread_key)) - THROWF(system_error, (int) GetLastError(), - "TlsFree() failed to cleanup the thread submodule"); -} - -int xbt_os_thread_atfork(void (*prepare)(void), - void (*parent)(void), void (*child)(void)) -{ - return 0; -} - -static DWORD WINAPI wrapper_start_routine(void *s) -{ - xbt_os_thread_t t = (xbt_os_thread_t) s; - DWORD *rv; - - if (!TlsSetValue(xbt_self_thread_key, t)) - THROWF(system_error, (int) GetLastError(), - "TlsSetValue of data describing the created thread failed"); - - rv = (DWORD *) ((t->start_routine) (t->param)); - - return rv ? *rv : 0; - -} - - -xbt_os_thread_t xbt_os_thread_create(const char *name, - pvoid_f_pvoid_t start_routine, - void *param, - void *extra_data) -{ - - xbt_os_thread_t t = xbt_new(s_xbt_os_thread_t, 1); - - t->name = xbt_strdup(name); - t->start_routine = start_routine; - t->param = param; - t->extra_data = extra_data; - t->handle = CreateThread(NULL, stack_size==0 ? XBT_DEFAULT_THREAD_STACK_SIZE : stack_size, - (LPTHREAD_START_ROUTINE) wrapper_start_routine, - t, STACK_SIZE_PARAM_IS_A_RESERVATION, &(t->id)); - - if (!t->handle) { - xbt_free(t); - THROWF(system_error, (int) GetLastError(), "CreateThread failed"); - } - - return t; -} - -void xbt_os_thread_setstacksize(int size) -{ - stack_size = size; -} - -void xbt_os_thread_setguardsize(int size) -{ - XBT_WARN("xbt_os_thread_setguardsize is not implemented (%d)", size); -} - -const char *xbt_os_thread_name(xbt_os_thread_t t) -{ - return t->name; -} - -const char *xbt_os_thread_self_name(void) -{ - xbt_os_thread_t t = xbt_os_thread_self(); - return t ? t->name : "main"; -} - -void xbt_os_thread_join(xbt_os_thread_t thread, void **thread_return) -{ - - if (WAIT_OBJECT_0 != WaitForSingleObject(thread->handle, INFINITE)) - THROWF(system_error, (int) GetLastError(), - "WaitForSingleObject failed"); - - if (thread_return) { - - if (!GetExitCodeThread(thread->handle, (DWORD *) (*thread_return))) - THROWF(system_error, (int) GetLastError(), - "GetExitCodeThread failed"); - } - - CloseHandle(thread->handle); - - free(thread->name); - - free(thread); -} - -void xbt_os_thread_exit(int *retval) -{ - if (retval) - ExitThread(*retval); - else - ExitThread(0); -} - -void xbt_os_thread_key_create(xbt_os_thread_key_t* key) { - - *key = TlsAlloc(); -} - -void xbt_os_thread_set_specific(xbt_os_thread_key_t key, void* value) { - - if (!TlsSetValue(key, value)) - THROWF(system_error, (int) GetLastError(), "TlsSetValue() failed"); -} - -void* xbt_os_thread_get_specific(xbt_os_thread_key_t key) { - return TlsGetValue(key); -} - -void xbt_os_thread_detach(xbt_os_thread_t thread) -{ - THROW_UNIMPLEMENTED; -} - - -xbt_os_thread_t xbt_os_thread_self(void) -{ - return TlsGetValue(xbt_self_thread_key); -} - -void *xbt_os_thread_getparam(void) -{ - xbt_os_thread_t t = xbt_os_thread_self(); - return t->param; -} - - -void xbt_os_thread_yield(void) -{ - Sleep(0); -} - -void xbt_os_thread_cancel(xbt_os_thread_t t) -{ - if (!TerminateThread(t->handle, 0)) - THROWF(system_error, (int) GetLastError(), "TerminateThread failed"); -} - -/****** mutex related functions ******/ -typedef struct xbt_os_mutex_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - CRITICAL_SECTION lock; -} s_xbt_os_mutex_t; - -xbt_os_mutex_t xbt_os_mutex_init(void) -{ - xbt_os_mutex_t res = xbt_new(s_xbt_os_mutex_t, 1); - - /* initialize the critical section object */ - InitializeCriticalSection(&(res->lock)); - - return res; -} - -void xbt_os_mutex_acquire(xbt_os_mutex_t mutex) -{ - EnterCriticalSection(&mutex->lock); -} - -void xbt_os_mutex_timedacquire(xbt_os_mutex_t mutex, double delay) -{ - THROW_UNIMPLEMENTED; -} - -void xbt_os_mutex_release(xbt_os_mutex_t mutex) -{ - - LeaveCriticalSection(&mutex->lock); - -} - -void xbt_os_mutex_destroy(xbt_os_mutex_t mutex) -{ - - if (!mutex) - return; - - DeleteCriticalSection(&mutex->lock); - free(mutex); -} - -/***** condition related functions *****/ -enum { /* KEEP IT IN SYNC WITH xbt_thread.c */ - SIGNAL = 0, - BROADCAST = 1, - MAX_EVENTS = 2 -}; - -typedef struct xbt_os_cond_ { - /* KEEP IT IN SYNC WITH xbt_thread.c */ - HANDLE events[MAX_EVENTS]; - - unsigned int waiters_count; /* the number of waiters */ - CRITICAL_SECTION waiters_count_lock; /* protect access to waiters_count */ -} s_xbt_os_cond_t; - -xbt_os_cond_t xbt_os_cond_init(void) -{ - - xbt_os_cond_t res = xbt_new0(s_xbt_os_cond_t, 1); - - memset(&res->waiters_count_lock, 0, sizeof(CRITICAL_SECTION)); - - /* initialize the critical section object */ - InitializeCriticalSection(&res->waiters_count_lock); - - res->waiters_count = 0; - - /* Create an auto-reset event */ - res->events[SIGNAL] = CreateEvent(NULL, FALSE, FALSE, NULL); - - if (!res->events[SIGNAL]) { - DeleteCriticalSection(&res->waiters_count_lock); - free(res); - THROWF(system_error, 0, "CreateEvent failed for the signals"); - } - - /* Create a manual-reset event. */ - res->events[BROADCAST] = CreateEvent(NULL, TRUE, FALSE, NULL); - - if (!res->events[BROADCAST]) { - - DeleteCriticalSection(&res->waiters_count_lock); - CloseHandle(res->events[SIGNAL]); - free(res); - THROWF(system_error, 0, "CreateEvent failed for the broadcasts"); - } - - return res; -} - -void xbt_os_cond_wait(xbt_os_cond_t cond, xbt_os_mutex_t mutex) -{ - - unsigned long wait_result; - int is_last_waiter; - - /* lock the threads counter and increment it */ - EnterCriticalSection(&cond->waiters_count_lock); - cond->waiters_count++; - LeaveCriticalSection(&cond->waiters_count_lock); - - /* unlock the mutex associate with the condition */ - LeaveCriticalSection(&mutex->lock); - - /* wait for a signal (broadcast or no) */ - wait_result = WaitForMultipleObjects(2, cond->events, FALSE, INFINITE); - - if (wait_result == WAIT_FAILED) - THROWF(system_error, 0, - "WaitForMultipleObjects failed, so we cannot wait on the condition"); - - /* we have a signal lock the condition */ - EnterCriticalSection(&cond->waiters_count_lock); - cond->waiters_count--; - - /* it's the last waiter or it's a broadcast ? */ - is_last_waiter = ((wait_result == WAIT_OBJECT_0 + BROADCAST - 1) - && (cond->waiters_count == 0)); - - LeaveCriticalSection(&cond->waiters_count_lock); - - /* yes it's the last waiter or it's a broadcast - * only reset the manual event (the automatic event is reset in the WaitForMultipleObjects() function - * by the system. - */ - if (is_last_waiter) - if (!ResetEvent(cond->events[BROADCAST])) - THROWF(system_error, 0, "ResetEvent failed"); - - /* relock the mutex associated with the condition in accordance with the posix thread specification */ - EnterCriticalSection(&mutex->lock); -} - -void xbt_os_cond_timedwait(xbt_os_cond_t cond, xbt_os_mutex_t mutex, - double delay) -{ - - unsigned long wait_result = WAIT_TIMEOUT; - int is_last_waiter; - unsigned long end = (unsigned long) (delay * 1000); - - - if (delay < 0) { - xbt_os_cond_wait(cond, mutex); - } else { - XBT_DEBUG("xbt_cond_timedwait(%p,%p,%lu)", &(cond->events), - &(mutex->lock), end); - - /* lock the threads counter and increment it */ - EnterCriticalSection(&cond->waiters_count_lock); - cond->waiters_count++; - LeaveCriticalSection(&cond->waiters_count_lock); - - /* unlock the mutex associate with the condition */ - LeaveCriticalSection(&mutex->lock); - /* wait for a signal (broadcast or no) */ - - wait_result = WaitForMultipleObjects(2, cond->events, FALSE, end); - - switch (wait_result) { - case WAIT_TIMEOUT: - THROWF(timeout_error, GetLastError(), - "condition %p (mutex %p) wasn't signaled before timeout (%f)", - cond, mutex, delay); - case WAIT_FAILED: - THROWF(system_error, GetLastError(), - "WaitForMultipleObjects failed, so we cannot wait on the condition"); - } - - /* we have a signal lock the condition */ - EnterCriticalSection(&cond->waiters_count_lock); - cond->waiters_count--; - - /* it's the last waiter or it's a broadcast ? */ - is_last_waiter = ((wait_result == WAIT_OBJECT_0 + BROADCAST - 1) - && (cond->waiters_count == 0)); - - LeaveCriticalSection(&cond->waiters_count_lock); - - /* yes it's the last waiter or it's a broadcast - * only reset the manual event (the automatic event is reset in the WaitForMultipleObjects() function - * by the system. - */ - if (is_last_waiter) - if (!ResetEvent(cond->events[BROADCAST])) - THROWF(system_error, 0, "ResetEvent failed"); - - /* relock the mutex associated with the condition in accordance with the posix thread specification */ - EnterCriticalSection(&mutex->lock); - } - /*THROW_UNIMPLEMENTED; */ -} - -void xbt_os_cond_signal(xbt_os_cond_t cond) -{ - int have_waiters; - - EnterCriticalSection(&cond->waiters_count_lock); - have_waiters = cond->waiters_count > 0; - LeaveCriticalSection(&cond->waiters_count_lock); - - if (have_waiters) - if (!SetEvent(cond->events[SIGNAL])) - THROWF(system_error, 0, "SetEvent failed"); - - xbt_os_thread_yield(); -} - -void xbt_os_cond_broadcast(xbt_os_cond_t cond) -{ - int have_waiters; - - EnterCriticalSection(&cond->waiters_count_lock); - have_waiters = cond->waiters_count > 0; - LeaveCriticalSection(&cond->waiters_count_lock); - - if (have_waiters) - SetEvent(cond->events[BROADCAST]); -} - -void xbt_os_cond_destroy(xbt_os_cond_t cond) -{ - int error = 0; - - if (!cond) - return; - - if (!CloseHandle(cond->events[SIGNAL])) - error = 1; - - if (!CloseHandle(cond->events[BROADCAST])) - error = 1; - - DeleteCriticalSection(&cond->waiters_count_lock); - - xbt_free(cond); - - if (error) - THROWF(system_error, 0, "Error while destroying the condition"); -} - -typedef struct xbt_os_sem_ { - HANDLE h; - unsigned int value; - CRITICAL_SECTION value_lock; /* protect access to value of the semaphore */ -} s_xbt_os_sem_t; - -#ifndef INT_MAX -# define INT_MAX 32767 /* let's be safe by underestimating this value: this is for 16bits only */ #endif - -xbt_os_sem_t xbt_os_sem_init(unsigned int value) -{ - xbt_os_sem_t res; - - if (value > INT_MAX) - THROWF(arg_error, value, - "Semaphore initial value too big: %ud cannot be stored as a signed int", - value); - - res = (xbt_os_sem_t) xbt_new0(s_xbt_os_sem_t, 1); - - if (!(res->h = CreateSemaphore(NULL, value, (long) INT_MAX, NULL))) { - THROWF(system_error, GetLastError(), "CreateSemaphore() failed: %s", - strerror(GetLastError())); - return NULL; - } - - res->value = value; - - InitializeCriticalSection(&(res->value_lock)); - - return res; -} - -void xbt_os_sem_acquire(xbt_os_sem_t sem) -{ - if (!sem) - THROWF(arg_error, EINVAL, "Cannot acquire the NULL semaphore"); - - /* wait failure */ - if (WAIT_OBJECT_0 != WaitForSingleObject(sem->h, INFINITE)) - THROWF(system_error, GetLastError(), - "WaitForSingleObject() failed: %s", strerror(GetLastError())); - EnterCriticalSection(&(sem->value_lock)); - sem->value--; - LeaveCriticalSection(&(sem->value_lock)); -} - -void xbt_os_sem_timedacquire(xbt_os_sem_t sem, double timeout) -{ - long seconds; - long milliseconds; - double end = timeout + xbt_os_time(); - - if (!sem) - THROWF(arg_error, EINVAL, "Cannot acquire the NULL semaphore"); - - if (timeout < 0) { - xbt_os_sem_acquire(sem); - } else { /* timeout can be zero <-> try acquire ) */ - - - seconds = (long) floor(end); - milliseconds = (long) ((end - seconds) * 1000); - milliseconds += (seconds * 1000); - - switch (WaitForSingleObject(sem->h, milliseconds)) { - case WAIT_OBJECT_0: - EnterCriticalSection(&(sem->value_lock)); - sem->value--; - LeaveCriticalSection(&(sem->value_lock)); - return; - - case WAIT_TIMEOUT: - THROWF(timeout_error, GetLastError(), - "semaphore %p wasn't signaled before timeout (%f)", sem, - timeout); - return; - - default: - THROWF(system_error, GetLastError(), - "WaitForSingleObject(%p,%f) failed: %s", sem, timeout, - strerror(GetLastError())); - } - } -} - -void xbt_os_sem_release(xbt_os_sem_t sem) -{ - if (!sem) - THROWF(arg_error, EINVAL, "Cannot release the NULL semaphore"); - - if (!ReleaseSemaphore(sem->h, 1, NULL)) - THROWF(system_error, GetLastError(), "ReleaseSemaphore() failed: %s", - strerror(GetLastError())); - EnterCriticalSection(&(sem->value_lock)); - sem->value++; - LeaveCriticalSection(&(sem->value_lock)); -} - -void xbt_os_sem_destroy(xbt_os_sem_t sem) -{ - if (!sem) - THROWF(arg_error, EINVAL, "Cannot destroy the NULL semaphore"); - - if (!CloseHandle(sem->h)) - THROWF(system_error, GetLastError(), "CloseHandle() failed: %s", - strerror(GetLastError())); - - DeleteCriticalSection(&(sem->value_lock)); - xbt_free(sem); - } -void xbt_os_sem_get_value(xbt_os_sem_t sem, int *svalue) -{ - if (!sem) - THROWF(arg_error, EINVAL, - "Cannot get the value of the NULL semaphore"); - - EnterCriticalSection(&(sem->value_lock)); - *svalue = sem->value; - LeaveCriticalSection(&(sem->value_lock)); -} - - -#endif - - /** @brief Returns the amount of cores on the current host */ int xbt_os_get_numcores(void) { #ifdef WIN32 @@ -1269,14 +461,6 @@ int xbt_os_get_numcores(void) { #endif } - -/***** reentrant mutexes *****/ -typedef struct xbt_os_rmutex_ { - xbt_os_mutex_t mutex; - xbt_os_thread_t owner; - int count; -} s_xbt_os_rmutex_t; - void xbt_os_thread_set_extra_data(void *data) { xbt_os_thread_self()->extra_data = data; @@ -1284,55 +468,6 @@ void xbt_os_thread_set_extra_data(void *data) void *xbt_os_thread_get_extra_data(void) { - xbt_os_thread_t self = xbt_os_thread_self(); - return self? self->extra_data : NULL; -} - -xbt_os_rmutex_t xbt_os_rmutex_init(void) -{ - xbt_os_rmutex_t rmutex = xbt_new0(struct xbt_os_rmutex_, 1); - rmutex->mutex = xbt_os_mutex_init(); - rmutex->owner = NULL; - rmutex->count = 0; - return rmutex; -} - -void xbt_os_rmutex_acquire(xbt_os_rmutex_t rmutex) -{ - xbt_os_thread_t self = xbt_os_thread_self(); - - if (self == NULL) { - /* the thread module is not initialized yet */ - rmutex->owner = NULL; - return; - } - - if (self != rmutex->owner) { - xbt_os_mutex_acquire(rmutex->mutex); - rmutex->owner = self; - rmutex->count = 1; - } else { - rmutex->count++; - } -} - -void xbt_os_rmutex_release(xbt_os_rmutex_t rmutex) -{ - if (rmutex->owner == NULL) { - /* the thread module was not initialized */ - return; - } - - xbt_assert(rmutex->owner == xbt_os_thread_self()); - - if (--rmutex->count == 0) { - rmutex->owner = NULL; - xbt_os_mutex_release(rmutex->mutex); - } -} - -void xbt_os_rmutex_destroy(xbt_os_rmutex_t rmutex) -{ - xbt_os_mutex_destroy(rmutex->mutex); - xbt_free(rmutex); + xbt_os_thread_t thread = xbt_os_thread_self(); + return thread ? thread->extra_data : NULL; }